Weighing scale



Aug. 19, 1,930. c. .1.4 zlNKE Er AL WEIGHING S CALE Filed Oct. 18. 1926 3 SheetsSheet .3

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Patented Aug. 19, 1930 UNITED STATES PATENT OFFICE CARL J'. ZINKE AND ORWELL C. REEVES, OF TOLEDO, OHIO, ASSIGNORS TO TOLEDO SCALE COMPANY, OF TOLEDO, OHIO, A CORPORATION OF NEW JERSEY WEIGHING SCALE Application led October 18, 1926.

rIhis invention relates to weighing scales, and one of its principal objects is the provision of a weighing scale having great sensitiveness and at the same time capable of weighing comparatively heavy loads.

Another object is the provision of a scale in which the arrangement of the commodityreceiver and indicator is such as to facilitate the reading of weights and computations.

Another object is the provision of an automatic pendulum scale capable of weighing light loads with great accuracy but nevertheless having a comparatively heavy and stable automatic load counterbalance.

Another object is the provision of a scale of this type capable of being manufactured largely from sheet metal.

Another object is the provision of a scale which is economical to manufacture, light in 20 weight and at the same time of rigid and sturdy construction.

Other objects and advantages will be apparent from the following description, in which reference is had to the accompanying drawings illustrating a preferred embodiment of the invention and wherein similar reference numerals designate similar parts throughout the several views.

In the drawings Figure I is a front elevational view of a scale embodying our invention;

Figure II is a side elevation thereof;

Figure III is an enlarged side sectional view of the scale;

Figure IV is an enlarged plan view of the base and platform lever mechanism; and

Figure V is an enlarged front elevational View, parts broken away and parts shown in section.

The base 1 of the scale is stamped from sheet metal having a downturned edge 2,

- which adds to its strength and enhances its appearance, and a depressed central portion 3. Secured to the base 1 by means of nuts 4 are studs 5 into which are threaded leveling screws 6 by means of which the condition of level of the scale may be adjusted. The studs 5 and nuts 4 also serve as securing means for fulcrum stands 7 preferably formed of strap metal, which rise from serial No. 142,185.

the base at each side. The fulcrum stands 7 are additionally secured in place by means of brackets 8 which are in turn secured to side plates 9 supported upon the base l.

The side plates 9 `with front and rear plates 10 and 11 and a cover plate 12 serve to house the platform lever mechanism.

Mounted by means of fulcrum pivots 13 upon the fulcrum stands 7 is the main lever 14 of the scale. This lever, as is shown in Figure lV, is substantially U-shaped in plan, its load pivots 15 being located substantially at the ends of the arms of the U. Carried by the load pivots 15 is a spider 16 from which rise posts 17 that extend upwardly through the cover plate 12 and support the commodityreceiving platter 18. In order to maintain the condition of level of the platter throughout weighing movements the spider 16 is provided with a downwardly extending spider stem 19 which is connected by means of check links 20 to a shift post 21 adj ustably mounted on the base l. A receptacle for loading is provided in the spider 16 and is covered by a plate 22.

Overlying the base housing adjacent its rear edge is a deck 23 upon which is mounted a small cabinet 24 surmounted by a fanshaped housing 257 the cabinet and fanshaped housing rbeing arranged to support the load-counterbalancing and indicating mechanism of the scale.

Extending rearwardly from the main lever 14 are a short integral arm 2G and an adjustable arm 27. The arms 26 and 27 arc provided with load pivots 2S upon which is mounted a second spider 29, and a post 3.0 is fixed upon the spider 29 and extends upwardly through the opening in the deck 23 supporting upon its upper end a weight-receiving pan 3l. The spider V29 is also provided with a downwardly extending spider stein 32 which is connected by means of aA shift link 33 to a shift post 34, the pivots supporting the lever 14, the spider 29 and the link 33 being arranged in parallelogrammatic relation, so that the condition of level of the pan 31 is maintained throughout weighing movements of the scale.

The main lever 14 is also provided with a rearivard extension which carries nose pivot, the nose pivot being connected by means ot' a stirrup and a tleziible metallic ribbon 3T to a load-counterbalaneii f lum 38. rThe pendulum 8S in tl;t vice illustrated is supported on seit-eli` bearings mounted upon a bracket i139 i Within the cabinet 2 vvhile an indicator hand el() rigidly connected with the pendulum 3S extends upwardly into the fan-shaped housing 25 Where it cci-operates vvith a l'anshaped chart Lll, the chart and hand being visible through a ivindovv 'trom a position in Yfront oll the platform 18 and the tip ot the hand which swings in an arcuate slot el?, being visible from the rear ot the scale through a smaller ivindovv 4l.

rlhe pendulum 30 oo is ott the so-called 'talling type. ltis swung to the right in its position et greatest elevation Twhen the commodity-receiving platform 1S is empty, being held in its elevated position by the Weight ot the spider 29, which is sullicient to over-balance the weight at the opposite end of the lever and hold the pendulum in elevated position. lllhen a commodity is placed upon the cominoditysreceiving platform itl it counterbalances a part of the Weight of the spider 29, thus allowing;- the pendulum 8S to descend and swine' the han d l0 over the chart.

it ivill be seen that the chart laces the scale operator standing` in :trent of the platform. rhis arrangement is particularly desirable when the scale is to be used to vveigh a suecession et packages vvhich pass over the platt'orm from one e to 'the other and it is also desirable because with the chart. directly behind the platform errors ot parallax in reading' the scale are avoided.

The main lever ll in the scale shovvn is of the so-called even balance type-that is to s y, a load on the commodity-receiving plat- ;torm 1S Will be exactly counterbalanced by an equal load on the pan Si. The lever, hovvever, may be made of any desired multiplication and the counterweights to be used upon the pan 3l made accordingly.

lllith the arrangement shown the pendulum 38 may be relatively heavy, While the amount of movement ot the indicator hand per ounce oi' change in weight ot the load will be coniparatively great. rl`he capacity ot the pendulum may, 'for example. be 5 lbs., so that very small hannes in weight Will be clearly licated by the hand, ivliile the total capacit oit the scale is limited only by the strength of the parts and the amount of eountern'eiglit that can be piled on the pan 3l.

The embodiment ot' our invention herein shovvn and described is to be regarded a illustrative only, and it is to be understood that the invention is susceptible to variation, n'iodilication and change Within the spirit and scope of the subjoined claims.

Having described the invention, ive claim:

l. ln a. Weighing scale, in combination, a plattorm lever otI the lirst orde a commodity-receiver supported by one end oft said platform lever, a weight-receiver supported by the other end ot said lever, an indicator j said cominodity-receiver, and means fonneeting said indicator to the end of' said lever which supports said weight-receiver.

Q. ln a Weighing scale, in combination, a commodity-receiver, an indicator facingY said commodity-receiver, a Weightsreceiver located laterally ot said indicator, and mechanism connecting` said commodity-receiver, said indicator and said Weight-receiver.

l. ln a WeighingT scale, in con'ibination, a lever ot the .first order, a commodity-receiver supported upon one end of said lever, a v-:eie'lit-receiver supported on the other end thereof, and indica mechanism connected to the Weight-receiver sulniorting end ot said lever am lacing said commodity-receiver.

l. ln a vveif j'liiimT scale, in combination, a lever oit' the lirst order, a conlmodity-receiver supported on one end et said lever, an autos matie load-counterbalance connected to the et er end ol" said lever, the end ot' said .lever connected to said loadscounter-balance being over-weighted to hold said commodity-receiver in elevated position when empty, and an indicator connected to said load-counterbalance and 'facing said cominodity-receiver.

ln a Weighing scale, in combination, a lever et the Virst order, a commodity-receiver supported on one end of lever, an automatic load-counterbalance connected to the other end thereof, means for over-Weighting the end o't said lever connected to said counterl'ialance and thereby holding said commodity-receiver in elevated position when empty, and a Weighbreceiver supported by the over-Weighted end ot said lever.

6. ln a Weighine,r scale, in combination, a lever ot the lirst order, a commedity-receiver supported on one end ot said lever, an automatic load-counterbalance connected to the other end thereol, means ilor over-Weightin;r the. end of said lever connected to said eounterbalance and thereby holding said commodity-receiver in elevated position when empty, a Weight-receiver supported by the over-Weighted end ot said lever, and an indicator connected to said load-eoimterbalanciugA mechanisn'i and taciinr said commodity-receiver.

7. ln a. weighing scale, in combination, a lever ot the lirst order, said lever being subintially U-shaped plan, a eoinmodityreceiver siip] ioitod at the ends ot the arms of said U-shaped lever, and an automatic loadcounterbalance located substantially above the bight portion ol said U-sliaped lever connected to the bight portion of said U-shaped lever.

8 In a. Weighing scale, in combination, a. lever ot the first order, said lever being substantially U-shaped in plan, a commodity-receiver supported at the ends of the arms of said U-shaped lever, and an automatic loadcounterbalance connected to the bight portion of said U-shaped lever and located thereabove, the bght portion of said U-shaped lever being Weighted to normally hold said commodity-receiver in elevated position.

CARL J. ZINKE. ORWELL C. REEVES. 

